Study on Seismic Behavior of Cross-Shaped-Steel-Reinforced RPC Columns

IF 3.1 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Buildings Pub Date : 2024-07-25 DOI:10.3390/buildings14082310

Jingmin Wang, Zhiyu Zhu, Kun Wang

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Abstract

Based on the hysteretic tests of steel-reinforced reactive powder concrete (RPC) columns and reinforced RPC columns, the finite element numerical models of these two kinds of RPC columns were established by OpenSees (2016). The feasibility of the model was verified by comparing the results of tests and simulation. On this basis, the nonlinear analysis of seismic performance of cross-shaped-steel-reinforced RPC columns was carried out. The influences of different factors such as longitudinal reinforcement ratio, steel sectional resistance moment, RPC grade, steel strength and section form of shape steel on the hysteretic performance were investigated. Finally, the hysteretic model of cross-shaped-steel-reinforced RPC columns was established. The results showed that, compared with H-shaped-steel-reinforced RPC columns, the peak bearing capacity of cross-shaped-steel-reinforced RPC columns was increased by 21.2%, but the displacement ductility was obviously reduced. With the increase of slenderness ratio, the lateral stiffness and horizontal bearing capacity of cross-shaped steel RPC columns decreased rapidly. In addition, the peak load was improved with the increase of RPC strength, steel sectional resistance moment and longitudinal reinforcement ratio. The hysteretic model was consistent with the simulation results, which can effectively predict the hysteretic characteristics of cross-shaped-steel-reinforced RPC columns. The research results can provide a theoretical basis for the engineering design and application of cross-shaped-steel-reinforced RPC columns.

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十字形钢筋 RPC 柱的抗震性能研究

基于钢筋反应粉末混凝土（RPC）柱和钢筋反应粉末混凝土（RPC）柱的滞回试验，OpenSees（2016）建立了这两种 RPC 柱的有限元数值模型。通过对比试验和模拟结果，验证了模型的可行性。在此基础上，对十字形钢筋 RPC 柱的抗震性能进行了非线性分析。研究了纵向配筋率、钢材截面抵抗矩、RPC 等级、钢材强度和型钢截面形式等不同因素对滞回性能的影响。最后，建立了十字形钢筋 RPC 柱的滞回模型。结果表明，与 H 型钢加固 RPC 柱相比，十字型钢加固 RPC 柱的峰值承载力提高了 21.2%，但位移延性明显降低。随着细长比的增加，十字形钢筋 RPC 柱的侧向刚度和水平承载力急剧下降。此外，随着 RPC 强度、钢截面抵抗矩和纵向配筋率的增加，峰值荷载得到改善。滞回模型与模拟结果一致，可有效预测十字形钢筋 RPC 柱的滞回特性。研究结果可为十字形钢筋 RPC 柱的工程设计和应用提供理论依据。

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来源期刊

Buildings Multiple-

CiteScore

3.40

自引率

26.30%

发文量

1883

审稿时长

11 weeks

期刊介绍： BUILDINGS content is primarily staff-written and submitted information is evaluated by the editors for its value to the audience. Such information may be used in articles with appropriate attribution to the source. The editorial staff considers information on the following topics: -Issues directed at building owners and facility managers in North America -Issues relevant to existing buildings, including retrofits, maintenance and modernization -Solution-based content, such as tips and tricks -New construction but only with an eye to issues involving maintenance and operation We generally do not review the following topics because these are not relevant to our readers: -Information on the residential market with the exception of multifamily buildings -International news unrelated to the North American market -Real estate market updates or construction updates